Airtac MFD Double Rod Miniature Cylinder MFD40X125
The AirTAC Airtac MFD Double Rod Miniature Cylinder MFD40X125 is a genuine double acting, double rod JIS-standard round-body mini air cylinder with a Ø40mm bore and 125mm stroke, 1/4" air ports and a SUS304 stainless-steel barrel for mildly corrosive environments. For the same bore and stroke it is shorter than an ISO 6432 cylinder, saving mounting space.
- BoreØ40 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting, double rod
- Rod threadM14×1.5
- CushionFixed TPU bumper pads
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MFD Double Rod Miniature Cylinder MFD40X125
Twin rods exiting both covers define this AirTAC MFD40X125, yielding equal thrust in extend and retract while steadying the load against side-play. As a JIS-standard round-body mini cylinder, it uses a SUS304 stainless barrel with riveted aluminium covers, offering a shorter overall body than an ISO 6432 unit for the same 40 mm bore and 125 mm stroke.
Operating at 0.5 MPa, it generates 527.8 N of force each way, climbing to 738.9 N at 0.7 MPa. This bore uses a 1/4" port and M14x1.5 male rod threads. For a safe working load, expect about 317 N, or a vertical lift of roughly 26.9 kg with a 2:1 margin. Note this SKU lacks a magnet, so it cannot take CMSG/DMSG/EMSG switches.
Airtac MFD Double Rod Miniature Cylinder MFD40X125 Technical Specifications
| Model | Airtac MFD Double Rod Miniature Cylinder MFD40X125 |
|---|---|
| Series | MFD JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Acting type | Double acting, double rod |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Fixed TPU bumper pads |
| Max standard stroke | Up to 300 mm |
Specifications follow the official AirTAC MF/MFC (JIS-standard) datasheet. Barrel: SUS304 stainless steel; covers: aluminum alloy (round-body, riveted rolling-packed construction). Thread options: PT (blank) / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa | 739 N |
| Max (@1.0 MPa) | 108 kgf |
Double-rod: a rod exits both covers, so output force is equal in both directions (rod-side area used).
Model Code: Airtac MFD Double Rod Miniature Cylinder MFD40X125
| MFD | JIS-standard round-body mini cylinder (double-rod). |
|---|---|
| 40 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
MF-family variants: MF / MFC (double acting ±cushion), MSF / MTF (single acting push / pull), MFD / MFCD (double rod ±cushion), MFJ / MFCJ (adjustable stroke ±cushion). Back covers CA / U / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MFD Double Rod Miniature Cylinder MFD40X125 Is Used
Twin-Tool Actuation
Mount a gripper on the front rod and a part ejector on the back rod to drive two sequential operations with 527.8 N of equal thrust.
Anti-Rotation Slides
Move a 125 mm stroke machining fixture without rotational play, using the dual 16 mm rods to guide the load steadily.
Back-Rod Switching
Use the extending rear rod to trip a mechanical limit valve or physical stopper, synchronizing a conveyor transfer at 0.5 MPa.
Is the Airtac MFD Double Rod Miniature Cylinder MFD40X125 the Right Cylinder?
When sizing between the two largest frames, the MFD40 delivers 527.8 N at 0.5 MPa versus 345.6 N for the MFD32, giving you extra thrust for heavier jigs. The double-rod build is ideal when you need anti-rotation stability or want to mount a second tool and a sensor flag on the back rod. This non-magnet SKU cannot host position switches; add the -S option for CMSG/DMSG/EMSG sensors.
Mounting options include LB foot, FA flange, and TC trunnion (there is no SDB or back-cover code because a rod exits both ends). Remember that fixed TPU bumper pads only decelerate the stroke end; they do not lock the piston. If air pressure drops, the load will drift, so fit an external rod lock or pilot check valve for holding.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Back cover (CA/U/CM) & mount (LB/FA/SDB/TC)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check Use correct back cover (CA/U/CM) & mount (LB/FA/SDB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac MFD Double Rod Miniature Cylinder MFD40X125 FAQ
It delivers equal force both ways: 527.8 N at 0.5 MPa, 738.9 N at 0.7 MPa, and a theoretical max of 107.6 kgf at 1.0 MPa. The air port is 1/4".
No, this specific SKU lacks a magnet and cannot take CMSG, DMSG, or EMSG switches. You must select the -S variant to enable magnetic sensing on the double-rod build.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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